Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Implements an IPX socket layer. | |
3 | * | |
4 | * This code is derived from work by | |
5 | * Ross Biro : Writing the original IP stack | |
6 | * Fred Van Kempen : Tidying up the TCP/IP | |
7 | * | |
8 | * Many thanks go to Keith Baker, Institute For Industrial Information | |
9 | * Technology Ltd, Swansea University for allowing me to work on this | |
10 | * in my own time even though it was in some ways related to commercial | |
11 | * work I am currently employed to do there. | |
12 | * | |
13 | * All the material in this file is subject to the Gnu license version 2. | |
14 | * Neither Alan Cox nor the Swansea University Computer Society admit | |
15 | * liability nor provide warranty for any of this software. This material | |
16 | * is provided as is and at no charge. | |
17 | * | |
18 | * Portions Copyright (c) 2000-2003 Conectiva, Inc. <acme@conectiva.com.br> | |
19 | * Neither Arnaldo Carvalho de Melo nor Conectiva, Inc. admit liability nor | |
20 | * provide warranty for any of this software. This material is provided | |
21 | * "AS-IS" and at no charge. | |
22 | * | |
23 | * Portions Copyright (c) 1995 Caldera, Inc. <greg@caldera.com> | |
24 | * Neither Greg Page nor Caldera, Inc. admit liability nor provide | |
25 | * warranty for any of this software. This material is provided | |
26 | * "AS-IS" and at no charge. | |
27 | * | |
28 | * See net/ipx/ChangeLog. | |
29 | */ | |
30 | ||
31 | #include <linux/config.h> | |
4fc268d2 | 32 | #include <linux/capability.h> |
1da177e4 LT |
33 | #include <linux/errno.h> |
34 | #include <linux/if_arp.h> | |
35 | #include <linux/if_ether.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/ipx.h> | |
38 | #include <linux/kernel.h> | |
39 | #include <linux/list.h> | |
40 | #include <linux/module.h> | |
41 | #include <linux/net.h> | |
42 | #include <linux/netdevice.h> | |
43 | #include <linux/uio.h> | |
44 | #include <linux/skbuff.h> | |
45 | #include <linux/socket.h> | |
46 | #include <linux/sockios.h> | |
47 | #include <linux/string.h> | |
1da177e4 LT |
48 | #include <linux/types.h> |
49 | #include <linux/termios.h> | |
50 | ||
51 | #include <net/ipx.h> | |
52 | #include <net/p8022.h> | |
53 | #include <net/psnap.h> | |
54 | #include <net/sock.h> | |
c752f073 | 55 | #include <net/tcp_states.h> |
1da177e4 LT |
56 | |
57 | #include <asm/uaccess.h> | |
58 | ||
59 | #ifdef CONFIG_SYSCTL | |
60 | extern void ipx_register_sysctl(void); | |
61 | extern void ipx_unregister_sysctl(void); | |
62 | #else | |
63 | #define ipx_register_sysctl() | |
64 | #define ipx_unregister_sysctl() | |
65 | #endif | |
66 | ||
67 | /* Configuration Variables */ | |
68 | static unsigned char ipxcfg_max_hops = 16; | |
69 | static char ipxcfg_auto_select_primary; | |
70 | static char ipxcfg_auto_create_interfaces; | |
71 | int sysctl_ipx_pprop_broadcasting = 1; | |
72 | ||
73 | /* Global Variables */ | |
74 | static struct datalink_proto *p8022_datalink; | |
75 | static struct datalink_proto *pEII_datalink; | |
76 | static struct datalink_proto *p8023_datalink; | |
77 | static struct datalink_proto *pSNAP_datalink; | |
78 | ||
90ddc4f0 | 79 | static const struct proto_ops ipx_dgram_ops; |
1da177e4 LT |
80 | |
81 | LIST_HEAD(ipx_interfaces); | |
82 | DEFINE_SPINLOCK(ipx_interfaces_lock); | |
83 | ||
84 | struct ipx_interface *ipx_primary_net; | |
85 | struct ipx_interface *ipx_internal_net; | |
86 | ||
87 | extern int ipxrtr_add_route(__u32 network, struct ipx_interface *intrfc, | |
88 | unsigned char *node); | |
89 | extern void ipxrtr_del_routes(struct ipx_interface *intrfc); | |
90 | extern int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx, | |
91 | struct iovec *iov, int len, int noblock); | |
92 | extern int ipxrtr_route_skb(struct sk_buff *skb); | |
93 | extern struct ipx_route *ipxrtr_lookup(__u32 net); | |
94 | extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg); | |
95 | ||
96 | #undef IPX_REFCNT_DEBUG | |
97 | #ifdef IPX_REFCNT_DEBUG | |
98 | atomic_t ipx_sock_nr; | |
99 | #endif | |
100 | ||
101 | struct ipx_interface *ipx_interfaces_head(void) | |
102 | { | |
103 | struct ipx_interface *rc = NULL; | |
104 | ||
105 | if (!list_empty(&ipx_interfaces)) | |
106 | rc = list_entry(ipx_interfaces.next, | |
107 | struct ipx_interface, node); | |
108 | return rc; | |
109 | } | |
110 | ||
111 | static void ipxcfg_set_auto_select(char val) | |
112 | { | |
113 | ipxcfg_auto_select_primary = val; | |
114 | if (val && !ipx_primary_net) | |
115 | ipx_primary_net = ipx_interfaces_head(); | |
116 | } | |
117 | ||
118 | static int ipxcfg_get_config_data(struct ipx_config_data __user *arg) | |
119 | { | |
120 | struct ipx_config_data vals; | |
121 | ||
122 | vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces; | |
123 | vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary; | |
124 | ||
125 | return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0; | |
126 | } | |
127 | ||
128 | /* | |
129 | * Note: Sockets may not be removed _during_ an interrupt or inet_bh | |
130 | * handler using this technique. They can be added although we do not | |
131 | * use this facility. | |
132 | */ | |
133 | ||
134 | static void ipx_remove_socket(struct sock *sk) | |
135 | { | |
136 | /* Determine interface with which socket is associated */ | |
137 | struct ipx_interface *intrfc = ipx_sk(sk)->intrfc; | |
138 | ||
139 | if (!intrfc) | |
140 | goto out; | |
141 | ||
142 | ipxitf_hold(intrfc); | |
143 | spin_lock_bh(&intrfc->if_sklist_lock); | |
144 | sk_del_node_init(sk); | |
145 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
146 | ipxitf_put(intrfc); | |
147 | out: | |
148 | return; | |
149 | } | |
150 | ||
151 | static void ipx_destroy_socket(struct sock *sk) | |
152 | { | |
153 | ipx_remove_socket(sk); | |
154 | skb_queue_purge(&sk->sk_receive_queue); | |
155 | #ifdef IPX_REFCNT_DEBUG | |
156 | atomic_dec(&ipx_sock_nr); | |
157 | printk(KERN_DEBUG "IPX socket %p released, %d are still alive\n", sk, | |
158 | atomic_read(&ipx_sock_nr)); | |
159 | if (atomic_read(&sk->sk_refcnt) != 1) | |
160 | printk(KERN_DEBUG "Destruction sock ipx %p delayed, cnt=%d\n", | |
161 | sk, atomic_read(&sk->sk_refcnt)); | |
162 | #endif | |
163 | sock_put(sk); | |
164 | } | |
165 | ||
166 | /* | |
167 | * The following code is used to support IPX Interfaces (IPXITF). An | |
168 | * IPX interface is defined by a physical device and a frame type. | |
169 | */ | |
170 | ||
171 | /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */ | |
172 | ||
173 | static void ipxitf_clear_primary_net(void) | |
174 | { | |
175 | ipx_primary_net = NULL; | |
176 | if (ipxcfg_auto_select_primary) | |
177 | ipx_primary_net = ipx_interfaces_head(); | |
178 | } | |
179 | ||
180 | static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev, | |
181 | unsigned short datalink) | |
182 | { | |
183 | struct ipx_interface *i; | |
184 | ||
185 | list_for_each_entry(i, &ipx_interfaces, node) | |
186 | if (i->if_dev == dev && i->if_dlink_type == datalink) | |
187 | goto out; | |
188 | i = NULL; | |
189 | out: | |
190 | return i; | |
191 | } | |
192 | ||
193 | static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev, | |
194 | unsigned short datalink) | |
195 | { | |
196 | struct ipx_interface *i; | |
197 | ||
198 | spin_lock_bh(&ipx_interfaces_lock); | |
199 | i = __ipxitf_find_using_phys(dev, datalink); | |
200 | if (i) | |
201 | ipxitf_hold(i); | |
202 | spin_unlock_bh(&ipx_interfaces_lock); | |
203 | return i; | |
204 | } | |
205 | ||
206 | struct ipx_interface *ipxitf_find_using_net(__u32 net) | |
207 | { | |
208 | struct ipx_interface *i; | |
209 | ||
210 | spin_lock_bh(&ipx_interfaces_lock); | |
211 | if (net) { | |
212 | list_for_each_entry(i, &ipx_interfaces, node) | |
213 | if (i->if_netnum == net) | |
214 | goto hold; | |
215 | i = NULL; | |
216 | goto unlock; | |
217 | } | |
218 | ||
219 | i = ipx_primary_net; | |
220 | if (i) | |
221 | hold: | |
222 | ipxitf_hold(i); | |
223 | unlock: | |
224 | spin_unlock_bh(&ipx_interfaces_lock); | |
225 | return i; | |
226 | } | |
227 | ||
228 | /* Sockets are bound to a particular IPX interface. */ | |
229 | static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk) | |
230 | { | |
231 | ipxitf_hold(intrfc); | |
232 | spin_lock_bh(&intrfc->if_sklist_lock); | |
233 | ipx_sk(sk)->intrfc = intrfc; | |
234 | sk_add_node(sk, &intrfc->if_sklist); | |
235 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
236 | ipxitf_put(intrfc); | |
237 | } | |
238 | ||
239 | /* caller must hold intrfc->if_sklist_lock */ | |
240 | static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc, | |
241 | unsigned short port) | |
242 | { | |
243 | struct sock *s; | |
244 | struct hlist_node *node; | |
245 | ||
246 | sk_for_each(s, node, &intrfc->if_sklist) | |
247 | if (ipx_sk(s)->port == port) | |
248 | goto found; | |
249 | s = NULL; | |
250 | found: | |
251 | return s; | |
252 | } | |
253 | ||
254 | /* caller must hold a reference to intrfc */ | |
255 | static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc, | |
256 | unsigned short port) | |
257 | { | |
258 | struct sock *s; | |
259 | ||
260 | spin_lock_bh(&intrfc->if_sklist_lock); | |
261 | s = __ipxitf_find_socket(intrfc, port); | |
262 | if (s) | |
263 | sock_hold(s); | |
264 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
265 | ||
266 | return s; | |
267 | } | |
268 | ||
269 | #ifdef CONFIG_IPX_INTERN | |
270 | static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc, | |
271 | unsigned char *ipx_node, | |
272 | unsigned short port) | |
273 | { | |
274 | struct sock *s; | |
275 | struct hlist_node *node; | |
276 | ||
277 | ipxitf_hold(intrfc); | |
278 | spin_lock_bh(&intrfc->if_sklist_lock); | |
279 | ||
280 | sk_for_each(s, node, &intrfc->if_sklist) { | |
281 | struct ipx_sock *ipxs = ipx_sk(s); | |
282 | ||
283 | if (ipxs->port == port && | |
284 | !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN)) | |
285 | goto found; | |
286 | } | |
287 | s = NULL; | |
288 | found: | |
289 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
290 | ipxitf_put(intrfc); | |
291 | return s; | |
292 | } | |
293 | #endif | |
294 | ||
295 | static void __ipxitf_down(struct ipx_interface *intrfc) | |
296 | { | |
297 | struct sock *s; | |
298 | struct hlist_node *node, *t; | |
299 | ||
300 | /* Delete all routes associated with this interface */ | |
301 | ipxrtr_del_routes(intrfc); | |
302 | ||
303 | spin_lock_bh(&intrfc->if_sklist_lock); | |
304 | /* error sockets */ | |
305 | sk_for_each_safe(s, node, t, &intrfc->if_sklist) { | |
306 | struct ipx_sock *ipxs = ipx_sk(s); | |
307 | ||
308 | s->sk_err = ENOLINK; | |
309 | s->sk_error_report(s); | |
310 | ipxs->intrfc = NULL; | |
311 | ipxs->port = 0; | |
312 | sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */ | |
313 | sk_del_node_init(s); | |
314 | } | |
315 | INIT_HLIST_HEAD(&intrfc->if_sklist); | |
316 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
317 | ||
318 | /* remove this interface from list */ | |
319 | list_del(&intrfc->node); | |
320 | ||
321 | /* remove this interface from *special* networks */ | |
322 | if (intrfc == ipx_primary_net) | |
323 | ipxitf_clear_primary_net(); | |
324 | if (intrfc == ipx_internal_net) | |
325 | ipx_internal_net = NULL; | |
326 | ||
327 | if (intrfc->if_dev) | |
328 | dev_put(intrfc->if_dev); | |
329 | kfree(intrfc); | |
330 | } | |
331 | ||
332 | void ipxitf_down(struct ipx_interface *intrfc) | |
333 | { | |
334 | spin_lock_bh(&ipx_interfaces_lock); | |
335 | __ipxitf_down(intrfc); | |
336 | spin_unlock_bh(&ipx_interfaces_lock); | |
337 | } | |
338 | ||
339 | static __inline__ void __ipxitf_put(struct ipx_interface *intrfc) | |
340 | { | |
341 | if (atomic_dec_and_test(&intrfc->refcnt)) | |
342 | __ipxitf_down(intrfc); | |
343 | } | |
344 | ||
345 | static int ipxitf_device_event(struct notifier_block *notifier, | |
346 | unsigned long event, void *ptr) | |
347 | { | |
348 | struct net_device *dev = ptr; | |
349 | struct ipx_interface *i, *tmp; | |
350 | ||
351 | if (event != NETDEV_DOWN && event != NETDEV_UP) | |
352 | goto out; | |
353 | ||
354 | spin_lock_bh(&ipx_interfaces_lock); | |
355 | list_for_each_entry_safe(i, tmp, &ipx_interfaces, node) | |
356 | if (i->if_dev == dev) { | |
357 | if (event == NETDEV_UP) | |
358 | ipxitf_hold(i); | |
359 | else | |
360 | __ipxitf_put(i); | |
361 | } | |
362 | spin_unlock_bh(&ipx_interfaces_lock); | |
363 | out: | |
364 | return NOTIFY_DONE; | |
365 | } | |
366 | ||
367 | ||
368 | static __exit void ipxitf_cleanup(void) | |
369 | { | |
370 | struct ipx_interface *i, *tmp; | |
371 | ||
372 | spin_lock_bh(&ipx_interfaces_lock); | |
373 | list_for_each_entry_safe(i, tmp, &ipx_interfaces, node) | |
374 | __ipxitf_put(i); | |
375 | spin_unlock_bh(&ipx_interfaces_lock); | |
376 | } | |
377 | ||
378 | static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb) | |
379 | { | |
380 | if (sock_queue_rcv_skb(sock, skb) < 0) | |
381 | kfree_skb(skb); | |
382 | } | |
383 | ||
384 | /* | |
385 | * On input skb->sk is NULL. Nobody is charged for the memory. | |
386 | */ | |
387 | ||
388 | /* caller must hold a reference to intrfc */ | |
389 | ||
390 | #ifdef CONFIG_IPX_INTERN | |
391 | static int ipxitf_demux_socket(struct ipx_interface *intrfc, | |
392 | struct sk_buff *skb, int copy) | |
393 | { | |
394 | struct ipxhdr *ipx = ipx_hdr(skb); | |
395 | int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node, | |
396 | IPX_NODE_LEN); | |
397 | struct sock *s; | |
398 | struct hlist_node *node; | |
399 | int rc; | |
400 | ||
401 | spin_lock_bh(&intrfc->if_sklist_lock); | |
402 | ||
403 | sk_for_each(s, node, &intrfc->if_sklist) { | |
404 | struct ipx_sock *ipxs = ipx_sk(s); | |
405 | ||
406 | if (ipxs->port == ipx->ipx_dest.sock && | |
407 | (is_broadcast || !memcmp(ipx->ipx_dest.node, | |
408 | ipxs->node, IPX_NODE_LEN))) { | |
409 | /* We found a socket to which to send */ | |
410 | struct sk_buff *skb1; | |
411 | ||
412 | if (copy) { | |
413 | skb1 = skb_clone(skb, GFP_ATOMIC); | |
414 | rc = -ENOMEM; | |
415 | if (!skb1) | |
416 | goto out; | |
417 | } else { | |
418 | skb1 = skb; | |
419 | copy = 1; /* skb may only be used once */ | |
420 | } | |
421 | ipxitf_def_skb_handler(s, skb1); | |
422 | ||
423 | /* On an external interface, one socket can listen */ | |
424 | if (intrfc != ipx_internal_net) | |
425 | break; | |
426 | } | |
427 | } | |
428 | ||
429 | /* skb was solely for us, and we did not make a copy, so free it. */ | |
430 | if (!copy) | |
431 | kfree_skb(skb); | |
432 | ||
433 | rc = 0; | |
434 | out: | |
435 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
436 | return rc; | |
437 | } | |
438 | #else | |
439 | static struct sock *ncp_connection_hack(struct ipx_interface *intrfc, | |
440 | struct ipxhdr *ipx) | |
441 | { | |
442 | /* The packet's target is a NCP connection handler. We want to hand it | |
443 | * to the correct socket directly within the kernel, so that the | |
444 | * mars_nwe packet distribution process does not have to do it. Here we | |
445 | * only care about NCP and BURST packets. | |
446 | * | |
447 | * You might call this a hack, but believe me, you do not want a | |
448 | * complete NCP layer in the kernel, and this is VERY fast as well. */ | |
449 | struct sock *sk = NULL; | |
450 | int connection = 0; | |
451 | u8 *ncphdr = (u8 *)(ipx + 1); | |
452 | ||
453 | if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */ | |
454 | connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3); | |
455 | else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */ | |
456 | connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8); | |
457 | ||
458 | if (connection) { | |
459 | struct hlist_node *node; | |
460 | /* Now we have to look for a special NCP connection handling | |
461 | * socket. Only these sockets have ipx_ncp_conn != 0, set by | |
462 | * SIOCIPXNCPCONN. */ | |
463 | spin_lock_bh(&intrfc->if_sklist_lock); | |
464 | sk_for_each(sk, node, &intrfc->if_sklist) | |
465 | if (ipx_sk(sk)->ipx_ncp_conn == connection) { | |
466 | sock_hold(sk); | |
467 | goto found; | |
468 | } | |
469 | sk = NULL; | |
470 | found: | |
471 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
472 | } | |
473 | return sk; | |
474 | } | |
475 | ||
476 | static int ipxitf_demux_socket(struct ipx_interface *intrfc, | |
477 | struct sk_buff *skb, int copy) | |
478 | { | |
479 | struct ipxhdr *ipx = ipx_hdr(skb); | |
480 | struct sock *sock1 = NULL, *sock2 = NULL; | |
481 | struct sk_buff *skb1 = NULL, *skb2 = NULL; | |
482 | int rc; | |
483 | ||
484 | if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451) | |
485 | sock1 = ncp_connection_hack(intrfc, ipx); | |
486 | if (!sock1) | |
487 | /* No special socket found, forward the packet the normal way */ | |
488 | sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock); | |
489 | ||
490 | /* | |
491 | * We need to check if there is a primary net and if | |
492 | * this is addressed to one of the *SPECIAL* sockets because | |
493 | * these need to be propagated to the primary net. | |
494 | * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and | |
495 | * 0x456(Diagnostic). | |
496 | */ | |
497 | ||
498 | if (ipx_primary_net && intrfc != ipx_primary_net) { | |
499 | const int dsock = ntohs(ipx->ipx_dest.sock); | |
500 | ||
501 | if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456) | |
502 | /* The appropriate thing to do here is to dup the | |
503 | * packet and route to the primary net interface via | |
504 | * ipxitf_send; however, we'll cheat and just demux it | |
505 | * here. */ | |
506 | sock2 = ipxitf_find_socket(ipx_primary_net, | |
507 | ipx->ipx_dest.sock); | |
508 | } | |
509 | ||
510 | /* | |
511 | * If there is nothing to do return. The kfree will cancel any charging. | |
512 | */ | |
513 | rc = 0; | |
514 | if (!sock1 && !sock2) { | |
515 | if (!copy) | |
516 | kfree_skb(skb); | |
517 | goto out; | |
518 | } | |
519 | ||
520 | /* | |
521 | * This next segment of code is a little awkward, but it sets it up | |
522 | * so that the appropriate number of copies of the SKB are made and | |
523 | * that skb1 and skb2 point to it (them) so that it (they) can be | |
524 | * demuxed to sock1 and/or sock2. If we are unable to make enough | |
525 | * copies, we do as much as is possible. | |
526 | */ | |
527 | ||
528 | if (copy) | |
529 | skb1 = skb_clone(skb, GFP_ATOMIC); | |
530 | else | |
531 | skb1 = skb; | |
532 | ||
533 | rc = -ENOMEM; | |
534 | if (!skb1) | |
535 | goto out_put; | |
536 | ||
537 | /* Do we need 2 SKBs? */ | |
538 | if (sock1 && sock2) | |
539 | skb2 = skb_clone(skb1, GFP_ATOMIC); | |
540 | else | |
541 | skb2 = skb1; | |
542 | ||
543 | if (sock1) | |
544 | ipxitf_def_skb_handler(sock1, skb1); | |
545 | ||
546 | if (!skb2) | |
547 | goto out_put; | |
548 | ||
549 | if (sock2) | |
550 | ipxitf_def_skb_handler(sock2, skb2); | |
551 | ||
552 | rc = 0; | |
553 | out_put: | |
554 | if (sock1) | |
555 | sock_put(sock1); | |
556 | if (sock2) | |
557 | sock_put(sock2); | |
558 | out: | |
559 | return rc; | |
560 | } | |
561 | #endif /* CONFIG_IPX_INTERN */ | |
562 | ||
563 | static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc, | |
564 | struct sk_buff *skb) | |
565 | { | |
566 | struct sk_buff *skb2; | |
567 | int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head; | |
568 | int out_offset = intrfc->if_ipx_offset; | |
569 | int len; | |
570 | ||
571 | /* Hopefully, most cases */ | |
572 | if (in_offset >= out_offset) | |
573 | return skb; | |
574 | ||
575 | /* Need new SKB */ | |
576 | len = skb->len + out_offset; | |
577 | skb2 = alloc_skb(len, GFP_ATOMIC); | |
578 | if (skb2) { | |
579 | skb_reserve(skb2, out_offset); | |
580 | skb2->nh.raw = skb2->h.raw = skb_put(skb2, skb->len); | |
581 | memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len); | |
582 | memcpy(skb2->cb, skb->cb, sizeof(skb->cb)); | |
583 | } | |
584 | kfree_skb(skb); | |
585 | return skb2; | |
586 | } | |
587 | ||
588 | /* caller must hold a reference to intrfc and the skb has to be unshared */ | |
589 | int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node) | |
590 | { | |
591 | struct ipxhdr *ipx = ipx_hdr(skb); | |
592 | struct net_device *dev = intrfc->if_dev; | |
593 | struct datalink_proto *dl = intrfc->if_dlink; | |
594 | char dest_node[IPX_NODE_LEN]; | |
595 | int send_to_wire = 1; | |
596 | int addr_len; | |
597 | ||
598 | ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl; | |
599 | ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net; | |
600 | ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net; | |
601 | ||
602 | /* see if we need to include the netnum in the route list */ | |
603 | if (IPX_SKB_CB(skb)->last_hop.index >= 0) { | |
604 | u32 *last_hop = (u32 *)(((u8 *) skb->data) + | |
605 | sizeof(struct ipxhdr) + | |
606 | IPX_SKB_CB(skb)->last_hop.index * | |
607 | sizeof(u32)); | |
608 | *last_hop = IPX_SKB_CB(skb)->last_hop.netnum; | |
609 | IPX_SKB_CB(skb)->last_hop.index = -1; | |
610 | } | |
611 | ||
612 | /* | |
613 | * We need to know how many skbuffs it will take to send out this | |
614 | * packet to avoid unnecessary copies. | |
615 | */ | |
616 | ||
617 | if (!dl || !dev || dev->flags & IFF_LOOPBACK) | |
618 | send_to_wire = 0; /* No non looped */ | |
619 | ||
620 | /* | |
621 | * See if this should be demuxed to sockets on this interface | |
622 | * | |
623 | * We want to ensure the original was eaten or that we only use | |
624 | * up clones. | |
625 | */ | |
626 | ||
627 | if (ipx->ipx_dest.net == intrfc->if_netnum) { | |
628 | /* | |
629 | * To our own node, loop and free the original. | |
630 | * The internal net will receive on all node address. | |
631 | */ | |
632 | if (intrfc == ipx_internal_net || | |
633 | !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) { | |
634 | /* Don't charge sender */ | |
635 | skb_orphan(skb); | |
636 | ||
637 | /* Will charge receiver */ | |
638 | return ipxitf_demux_socket(intrfc, skb, 0); | |
639 | } | |
640 | ||
641 | /* Broadcast, loop and possibly keep to send on. */ | |
642 | if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) { | |
643 | if (!send_to_wire) | |
644 | skb_orphan(skb); | |
645 | ipxitf_demux_socket(intrfc, skb, send_to_wire); | |
646 | if (!send_to_wire) | |
647 | goto out; | |
648 | } | |
649 | } | |
650 | ||
651 | /* | |
652 | * If the originating net is not equal to our net; this is routed | |
653 | * We are still charging the sender. Which is right - the driver | |
654 | * free will handle this fairly. | |
655 | */ | |
656 | if (ipx->ipx_source.net != intrfc->if_netnum) { | |
657 | /* | |
658 | * Unshare the buffer before modifying the count in | |
659 | * case it's a flood or tcpdump | |
660 | */ | |
661 | skb = skb_unshare(skb, GFP_ATOMIC); | |
662 | if (!skb) | |
663 | goto out; | |
664 | if (++ipx->ipx_tctrl > ipxcfg_max_hops) | |
665 | send_to_wire = 0; | |
666 | } | |
667 | ||
668 | if (!send_to_wire) { | |
669 | kfree_skb(skb); | |
670 | goto out; | |
671 | } | |
672 | ||
673 | /* Determine the appropriate hardware address */ | |
674 | addr_len = dev->addr_len; | |
675 | if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) | |
676 | memcpy(dest_node, dev->broadcast, addr_len); | |
677 | else | |
678 | memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len); | |
679 | ||
680 | /* Make any compensation for differing physical/data link size */ | |
681 | skb = ipxitf_adjust_skbuff(intrfc, skb); | |
682 | if (!skb) | |
683 | goto out; | |
684 | ||
685 | /* set up data link and physical headers */ | |
686 | skb->dev = dev; | |
687 | skb->protocol = htons(ETH_P_IPX); | |
688 | ||
689 | /* Send it out */ | |
690 | dl->request(dl, skb, dest_node); | |
691 | out: | |
692 | return 0; | |
693 | } | |
694 | ||
695 | static int ipxitf_add_local_route(struct ipx_interface *intrfc) | |
696 | { | |
697 | return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL); | |
698 | } | |
699 | ||
700 | static void ipxitf_discover_netnum(struct ipx_interface *intrfc, | |
701 | struct sk_buff *skb); | |
702 | static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb); | |
703 | ||
704 | static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb) | |
705 | { | |
706 | struct ipxhdr *ipx = ipx_hdr(skb); | |
707 | int rc = 0; | |
708 | ||
709 | ipxitf_hold(intrfc); | |
710 | ||
711 | /* See if we should update our network number */ | |
712 | if (!intrfc->if_netnum) /* net number of intrfc not known yet */ | |
713 | ipxitf_discover_netnum(intrfc, skb); | |
714 | ||
715 | IPX_SKB_CB(skb)->last_hop.index = -1; | |
716 | if (ipx->ipx_type == IPX_TYPE_PPROP) { | |
717 | rc = ipxitf_pprop(intrfc, skb); | |
718 | if (rc) | |
719 | goto out_free_skb; | |
720 | } | |
721 | ||
722 | /* local processing follows */ | |
723 | if (!IPX_SKB_CB(skb)->ipx_dest_net) | |
724 | IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum; | |
725 | if (!IPX_SKB_CB(skb)->ipx_source_net) | |
726 | IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum; | |
727 | ||
728 | /* it doesn't make sense to route a pprop packet, there's no meaning | |
729 | * in the ipx_dest_net for such packets */ | |
730 | if (ipx->ipx_type != IPX_TYPE_PPROP && | |
731 | intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) { | |
732 | /* We only route point-to-point packets. */ | |
733 | if (skb->pkt_type == PACKET_HOST) { | |
734 | skb = skb_unshare(skb, GFP_ATOMIC); | |
735 | if (skb) | |
736 | rc = ipxrtr_route_skb(skb); | |
737 | goto out_intrfc; | |
738 | } | |
739 | ||
740 | goto out_free_skb; | |
741 | } | |
742 | ||
743 | /* see if we should keep it */ | |
744 | if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) || | |
745 | !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) { | |
746 | rc = ipxitf_demux_socket(intrfc, skb, 0); | |
747 | goto out_intrfc; | |
748 | } | |
749 | ||
750 | /* we couldn't pawn it off so unload it */ | |
751 | out_free_skb: | |
752 | kfree_skb(skb); | |
753 | out_intrfc: | |
754 | ipxitf_put(intrfc); | |
755 | return rc; | |
756 | } | |
757 | ||
758 | static void ipxitf_discover_netnum(struct ipx_interface *intrfc, | |
759 | struct sk_buff *skb) | |
760 | { | |
761 | const struct ipx_cb *cb = IPX_SKB_CB(skb); | |
762 | ||
763 | /* see if this is an intra packet: source_net == dest_net */ | |
764 | if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) { | |
765 | struct ipx_interface *i = | |
766 | ipxitf_find_using_net(cb->ipx_source_net); | |
767 | /* NB: NetWare servers lie about their hop count so we | |
768 | * dropped the test based on it. This is the best way | |
769 | * to determine this is a 0 hop count packet. */ | |
770 | if (!i) { | |
771 | intrfc->if_netnum = cb->ipx_source_net; | |
772 | ipxitf_add_local_route(intrfc); | |
773 | } else { | |
774 | printk(KERN_WARNING "IPX: Network number collision " | |
775 | "%lx\n %s %s and %s %s\n", | |
776 | (unsigned long) htonl(cb->ipx_source_net), | |
777 | ipx_device_name(i), | |
778 | ipx_frame_name(i->if_dlink_type), | |
779 | ipx_device_name(intrfc), | |
780 | ipx_frame_name(intrfc->if_dlink_type)); | |
781 | ipxitf_put(i); | |
782 | } | |
783 | } | |
784 | } | |
785 | ||
786 | /** | |
787 | * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for | |
788 | * NetBIOS broadcasts | |
789 | * @intrfc: IPX interface receiving this packet | |
790 | * @skb: Received packet | |
791 | * | |
792 | * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it | |
793 | * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop | |
794 | * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we | |
795 | * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX | |
796 | * RIP and SAP Router Specification", Part Number 107-000029-001. | |
797 | * | |
798 | * If it is valid, check if we have pprop broadcasting enabled by the user, | |
799 | * if not, just return zero for local processing. | |
800 | * | |
801 | * If it is enabled check the packet and don't broadcast it if we have already | |
802 | * seen this packet. | |
803 | * | |
804 | * Broadcast: send it to the interfaces that aren't on the packet visited nets | |
805 | * array, just after the IPX header. | |
806 | * | |
807 | * Returns -EINVAL for invalid packets, so that the calling function drops | |
808 | * the packet without local processing. 0 if packet is to be locally processed. | |
809 | */ | |
810 | static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb) | |
811 | { | |
812 | struct ipxhdr *ipx = ipx_hdr(skb); | |
813 | int i, rc = -EINVAL; | |
814 | struct ipx_interface *ifcs; | |
815 | char *c; | |
816 | u32 *l; | |
817 | ||
818 | /* Illegal packet - too many hops or too short */ | |
819 | /* We decide to throw it away: no broadcasting, no local processing. | |
820 | * NetBIOS unaware implementations route them as normal packets - | |
821 | * tctrl <= 15, any data payload... */ | |
822 | if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS || | |
823 | ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) + | |
824 | IPX_MAX_PPROP_HOPS * sizeof(u32)) | |
825 | goto out; | |
826 | /* are we broadcasting this damn thing? */ | |
827 | rc = 0; | |
828 | if (!sysctl_ipx_pprop_broadcasting) | |
829 | goto out; | |
830 | /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we | |
831 | * process it locally. All previous hops broadcasted it, and process it | |
832 | * locally. */ | |
833 | if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS) | |
834 | goto out; | |
835 | ||
836 | c = ((u8 *) ipx) + sizeof(struct ipxhdr); | |
837 | l = (u32 *) c; | |
838 | ||
839 | /* Don't broadcast packet if already seen this net */ | |
840 | for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++) | |
841 | if (*l++ == intrfc->if_netnum) | |
842 | goto out; | |
843 | ||
844 | /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the | |
845 | * position where we will insert recvd netnum into list, later on, | |
846 | * in ipxitf_send */ | |
847 | IPX_SKB_CB(skb)->last_hop.index = i; | |
848 | IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum; | |
849 | /* xmit on all other interfaces... */ | |
850 | spin_lock_bh(&ipx_interfaces_lock); | |
851 | list_for_each_entry(ifcs, &ipx_interfaces, node) { | |
852 | /* Except unconfigured interfaces */ | |
853 | if (!ifcs->if_netnum) | |
854 | continue; | |
855 | ||
856 | /* That aren't in the list */ | |
857 | if (ifcs == intrfc) | |
858 | continue; | |
859 | l = (__u32 *) c; | |
860 | /* don't consider the last entry in the packet list, | |
861 | * it is our netnum, and it is not there yet */ | |
862 | for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++) | |
863 | if (ifcs->if_netnum == *l++) | |
864 | break; | |
865 | if (i == IPX_SKB_CB(skb)->ipx_tctrl) { | |
866 | struct sk_buff *s = skb_copy(skb, GFP_ATOMIC); | |
867 | ||
868 | if (s) { | |
869 | IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum; | |
870 | ipxrtr_route_skb(s); | |
871 | } | |
872 | } | |
873 | } | |
874 | spin_unlock_bh(&ipx_interfaces_lock); | |
875 | out: | |
876 | return rc; | |
877 | } | |
878 | ||
879 | static void ipxitf_insert(struct ipx_interface *intrfc) | |
880 | { | |
881 | spin_lock_bh(&ipx_interfaces_lock); | |
882 | list_add_tail(&intrfc->node, &ipx_interfaces); | |
883 | spin_unlock_bh(&ipx_interfaces_lock); | |
884 | ||
885 | if (ipxcfg_auto_select_primary && !ipx_primary_net) | |
886 | ipx_primary_net = intrfc; | |
887 | } | |
888 | ||
889 | static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __u32 netnum, | |
890 | unsigned short dlink_type, | |
891 | struct datalink_proto *dlink, | |
892 | unsigned char internal, | |
893 | int ipx_offset) | |
894 | { | |
895 | struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC); | |
896 | ||
897 | if (intrfc) { | |
898 | intrfc->if_dev = dev; | |
899 | intrfc->if_netnum = netnum; | |
900 | intrfc->if_dlink_type = dlink_type; | |
901 | intrfc->if_dlink = dlink; | |
902 | intrfc->if_internal = internal; | |
903 | intrfc->if_ipx_offset = ipx_offset; | |
904 | intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET; | |
905 | INIT_HLIST_HEAD(&intrfc->if_sklist); | |
906 | atomic_set(&intrfc->refcnt, 1); | |
907 | spin_lock_init(&intrfc->if_sklist_lock); | |
908 | } | |
909 | ||
910 | return intrfc; | |
911 | } | |
912 | ||
913 | static int ipxitf_create_internal(struct ipx_interface_definition *idef) | |
914 | { | |
915 | struct ipx_interface *intrfc; | |
916 | int rc = -EEXIST; | |
917 | ||
918 | /* Only one primary network allowed */ | |
919 | if (ipx_primary_net) | |
920 | goto out; | |
921 | ||
922 | /* Must have a valid network number */ | |
923 | rc = -EADDRNOTAVAIL; | |
924 | if (!idef->ipx_network) | |
925 | goto out; | |
926 | intrfc = ipxitf_find_using_net(idef->ipx_network); | |
927 | rc = -EADDRINUSE; | |
928 | if (intrfc) { | |
929 | ipxitf_put(intrfc); | |
930 | goto out; | |
931 | } | |
932 | intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0); | |
933 | rc = -EAGAIN; | |
934 | if (!intrfc) | |
935 | goto out; | |
936 | memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN); | |
937 | ipx_internal_net = ipx_primary_net = intrfc; | |
938 | ipxitf_hold(intrfc); | |
939 | ipxitf_insert(intrfc); | |
940 | ||
941 | rc = ipxitf_add_local_route(intrfc); | |
942 | ipxitf_put(intrfc); | |
943 | out: | |
944 | return rc; | |
945 | } | |
946 | ||
947 | static int ipx_map_frame_type(unsigned char type) | |
948 | { | |
949 | int rc = 0; | |
950 | ||
951 | switch (type) { | |
952 | case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break; | |
953 | case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break; | |
954 | case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break; | |
955 | case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break; | |
956 | } | |
957 | ||
958 | return rc; | |
959 | } | |
960 | ||
961 | static int ipxitf_create(struct ipx_interface_definition *idef) | |
962 | { | |
963 | struct net_device *dev; | |
964 | unsigned short dlink_type = 0; | |
965 | struct datalink_proto *datalink = NULL; | |
966 | struct ipx_interface *intrfc; | |
967 | int rc; | |
968 | ||
969 | if (idef->ipx_special == IPX_INTERNAL) { | |
970 | rc = ipxitf_create_internal(idef); | |
971 | goto out; | |
972 | } | |
973 | ||
974 | rc = -EEXIST; | |
975 | if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net) | |
976 | goto out; | |
977 | ||
978 | intrfc = ipxitf_find_using_net(idef->ipx_network); | |
979 | rc = -EADDRINUSE; | |
980 | if (idef->ipx_network && intrfc) { | |
981 | ipxitf_put(intrfc); | |
982 | goto out; | |
983 | } | |
984 | ||
985 | if (intrfc) | |
986 | ipxitf_put(intrfc); | |
987 | ||
988 | dev = dev_get_by_name(idef->ipx_device); | |
989 | rc = -ENODEV; | |
990 | if (!dev) | |
991 | goto out; | |
992 | ||
993 | switch (idef->ipx_dlink_type) { | |
994 | case IPX_FRAME_TR_8022: | |
995 | printk(KERN_WARNING "IPX frame type 802.2TR is " | |
996 | "obsolete Use 802.2 instead.\n"); | |
997 | /* fall through */ | |
998 | case IPX_FRAME_8022: | |
999 | dlink_type = htons(ETH_P_802_2); | |
1000 | datalink = p8022_datalink; | |
1001 | break; | |
1002 | case IPX_FRAME_ETHERII: | |
1003 | if (dev->type != ARPHRD_IEEE802) { | |
1004 | dlink_type = htons(ETH_P_IPX); | |
1005 | datalink = pEII_datalink; | |
1006 | break; | |
1007 | } else | |
1008 | printk(KERN_WARNING "IPX frame type EtherII over " | |
1009 | "token-ring is obsolete. Use SNAP " | |
1010 | "instead.\n"); | |
1011 | /* fall through */ | |
1012 | case IPX_FRAME_SNAP: | |
1013 | dlink_type = htons(ETH_P_SNAP); | |
1014 | datalink = pSNAP_datalink; | |
1015 | break; | |
1016 | case IPX_FRAME_8023: | |
1017 | dlink_type = htons(ETH_P_802_3); | |
1018 | datalink = p8023_datalink; | |
1019 | break; | |
1020 | case IPX_FRAME_NONE: | |
1021 | default: | |
1022 | rc = -EPROTONOSUPPORT; | |
1023 | goto out_dev; | |
1024 | } | |
1025 | ||
1026 | rc = -ENETDOWN; | |
1027 | if (!(dev->flags & IFF_UP)) | |
1028 | goto out_dev; | |
1029 | ||
1030 | /* Check addresses are suitable */ | |
1031 | rc = -EINVAL; | |
1032 | if (dev->addr_len > IPX_NODE_LEN) | |
1033 | goto out_dev; | |
1034 | ||
1035 | intrfc = ipxitf_find_using_phys(dev, dlink_type); | |
1036 | if (!intrfc) { | |
1037 | /* Ok now create */ | |
1038 | intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type, | |
1039 | datalink, 0, dev->hard_header_len + | |
1040 | datalink->header_length); | |
1041 | rc = -EAGAIN; | |
1042 | if (!intrfc) | |
1043 | goto out_dev; | |
1044 | /* Setup primary if necessary */ | |
1045 | if (idef->ipx_special == IPX_PRIMARY) | |
1046 | ipx_primary_net = intrfc; | |
1047 | if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000", | |
1048 | IPX_NODE_LEN)) { | |
1049 | memset(intrfc->if_node, 0, IPX_NODE_LEN); | |
1050 | memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len, | |
1051 | dev->dev_addr, dev->addr_len); | |
1052 | } else | |
1053 | memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN); | |
1054 | ipxitf_hold(intrfc); | |
1055 | ipxitf_insert(intrfc); | |
1056 | } | |
1057 | ||
1058 | ||
1059 | /* If the network number is known, add a route */ | |
1060 | rc = 0; | |
1061 | if (!intrfc->if_netnum) | |
1062 | goto out_intrfc; | |
1063 | ||
1064 | rc = ipxitf_add_local_route(intrfc); | |
1065 | out_intrfc: | |
1066 | ipxitf_put(intrfc); | |
1067 | goto out; | |
1068 | out_dev: | |
1069 | dev_put(dev); | |
1070 | out: | |
1071 | return rc; | |
1072 | } | |
1073 | ||
1074 | static int ipxitf_delete(struct ipx_interface_definition *idef) | |
1075 | { | |
1076 | struct net_device *dev = NULL; | |
1077 | unsigned short dlink_type = 0; | |
1078 | struct ipx_interface *intrfc; | |
1079 | int rc = 0; | |
1080 | ||
1081 | spin_lock_bh(&ipx_interfaces_lock); | |
1082 | if (idef->ipx_special == IPX_INTERNAL) { | |
1083 | if (ipx_internal_net) { | |
1084 | __ipxitf_put(ipx_internal_net); | |
1085 | goto out; | |
1086 | } | |
1087 | rc = -ENOENT; | |
1088 | goto out; | |
1089 | } | |
1090 | ||
1091 | dlink_type = ipx_map_frame_type(idef->ipx_dlink_type); | |
1092 | rc = -EPROTONOSUPPORT; | |
1093 | if (!dlink_type) | |
1094 | goto out; | |
1095 | ||
1096 | dev = __dev_get_by_name(idef->ipx_device); | |
1097 | rc = -ENODEV; | |
1098 | if (!dev) | |
1099 | goto out; | |
1100 | ||
1101 | intrfc = __ipxitf_find_using_phys(dev, dlink_type); | |
1102 | rc = -EINVAL; | |
1103 | if (!intrfc) | |
1104 | goto out; | |
1105 | __ipxitf_put(intrfc); | |
1106 | ||
1107 | rc = 0; | |
1108 | out: | |
1109 | spin_unlock_bh(&ipx_interfaces_lock); | |
1110 | return rc; | |
1111 | } | |
1112 | ||
1113 | static struct ipx_interface *ipxitf_auto_create(struct net_device *dev, | |
1114 | unsigned short dlink_type) | |
1115 | { | |
1116 | struct ipx_interface *intrfc = NULL; | |
1117 | struct datalink_proto *datalink; | |
1118 | ||
1119 | if (!dev) | |
1120 | goto out; | |
1121 | ||
1122 | /* Check addresses are suitable */ | |
1123 | if (dev->addr_len > IPX_NODE_LEN) | |
1124 | goto out; | |
1125 | ||
1126 | switch (htons(dlink_type)) { | |
1127 | case ETH_P_IPX: datalink = pEII_datalink; break; | |
1128 | case ETH_P_802_2: datalink = p8022_datalink; break; | |
1129 | case ETH_P_SNAP: datalink = pSNAP_datalink; break; | |
1130 | case ETH_P_802_3: datalink = p8023_datalink; break; | |
1131 | default: goto out; | |
1132 | } | |
1133 | ||
1134 | intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0, | |
1135 | dev->hard_header_len + datalink->header_length); | |
1136 | ||
1137 | if (intrfc) { | |
1138 | memset(intrfc->if_node, 0, IPX_NODE_LEN); | |
1139 | memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]), | |
1140 | dev->dev_addr, dev->addr_len); | |
1141 | spin_lock_init(&intrfc->if_sklist_lock); | |
1142 | atomic_set(&intrfc->refcnt, 1); | |
1143 | ipxitf_insert(intrfc); | |
1144 | dev_hold(dev); | |
1145 | } | |
1146 | ||
1147 | out: | |
1148 | return intrfc; | |
1149 | } | |
1150 | ||
1151 | static int ipxitf_ioctl(unsigned int cmd, void __user *arg) | |
1152 | { | |
1153 | int rc = -EINVAL; | |
1154 | struct ifreq ifr; | |
1155 | int val; | |
1156 | ||
1157 | switch (cmd) { | |
1158 | case SIOCSIFADDR: { | |
1159 | struct sockaddr_ipx *sipx; | |
1160 | struct ipx_interface_definition f; | |
1161 | ||
1162 | rc = -EFAULT; | |
1163 | if (copy_from_user(&ifr, arg, sizeof(ifr))) | |
1164 | break; | |
1165 | sipx = (struct sockaddr_ipx *)&ifr.ifr_addr; | |
1166 | rc = -EINVAL; | |
1167 | if (sipx->sipx_family != AF_IPX) | |
1168 | break; | |
1169 | f.ipx_network = sipx->sipx_network; | |
1170 | memcpy(f.ipx_device, ifr.ifr_name, | |
1171 | sizeof(f.ipx_device)); | |
1172 | memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN); | |
1173 | f.ipx_dlink_type = sipx->sipx_type; | |
1174 | f.ipx_special = sipx->sipx_special; | |
1175 | ||
1176 | if (sipx->sipx_action == IPX_DLTITF) | |
1177 | rc = ipxitf_delete(&f); | |
1178 | else | |
1179 | rc = ipxitf_create(&f); | |
1180 | break; | |
1181 | } | |
1182 | case SIOCGIFADDR: { | |
1183 | struct sockaddr_ipx *sipx; | |
1184 | struct ipx_interface *ipxif; | |
1185 | struct net_device *dev; | |
1186 | ||
1187 | rc = -EFAULT; | |
1188 | if (copy_from_user(&ifr, arg, sizeof(ifr))) | |
1189 | break; | |
1190 | sipx = (struct sockaddr_ipx *)&ifr.ifr_addr; | |
1191 | dev = __dev_get_by_name(ifr.ifr_name); | |
1192 | rc = -ENODEV; | |
1193 | if (!dev) | |
1194 | break; | |
1195 | ipxif = ipxitf_find_using_phys(dev, | |
1196 | ipx_map_frame_type(sipx->sipx_type)); | |
1197 | rc = -EADDRNOTAVAIL; | |
1198 | if (!ipxif) | |
1199 | break; | |
1200 | ||
1201 | sipx->sipx_family = AF_IPX; | |
1202 | sipx->sipx_network = ipxif->if_netnum; | |
1203 | memcpy(sipx->sipx_node, ipxif->if_node, | |
1204 | sizeof(sipx->sipx_node)); | |
1205 | rc = -EFAULT; | |
1206 | if (copy_to_user(arg, &ifr, sizeof(ifr))) | |
1207 | break; | |
1208 | ipxitf_put(ipxif); | |
1209 | rc = 0; | |
1210 | break; | |
1211 | } | |
1212 | case SIOCAIPXITFCRT: | |
1213 | rc = -EFAULT; | |
1214 | if (get_user(val, (unsigned char __user *) arg)) | |
1215 | break; | |
1216 | rc = 0; | |
1217 | ipxcfg_auto_create_interfaces = val; | |
1218 | break; | |
1219 | case SIOCAIPXPRISLT: | |
1220 | rc = -EFAULT; | |
1221 | if (get_user(val, (unsigned char __user *) arg)) | |
1222 | break; | |
1223 | rc = 0; | |
1224 | ipxcfg_set_auto_select(val); | |
1225 | break; | |
1226 | } | |
1227 | ||
1228 | return rc; | |
1229 | } | |
1230 | ||
1231 | /* | |
1232 | * Checksum routine for IPX | |
1233 | */ | |
1234 | ||
1235 | /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */ | |
1236 | /* This functions should *not* mess with packet contents */ | |
1237 | ||
1238 | __u16 ipx_cksum(struct ipxhdr *packet, int length) | |
1239 | { | |
1240 | /* | |
1241 | * NOTE: sum is a net byte order quantity, which optimizes the | |
1242 | * loop. This only works on big and little endian machines. (I | |
1243 | * don't know of a machine that isn't.) | |
1244 | */ | |
1245 | /* start at ipx_dest - We skip the checksum field and start with | |
1246 | * ipx_type before the loop, not considering ipx_tctrl in the calc */ | |
1247 | __u16 *p = (__u16 *)&packet->ipx_dest; | |
1248 | __u32 i = (length >> 1) - 1; /* Number of complete words */ | |
1249 | __u32 sum = packet->ipx_type << sizeof(packet->ipx_tctrl); | |
1250 | ||
1251 | /* Loop through all complete words except the checksum field, | |
1252 | * ipx_type (accounted above) and ipx_tctrl (not used in the cksum) */ | |
1253 | while (--i) | |
1254 | sum += *p++; | |
1255 | ||
1256 | /* Add on the last part word if it exists */ | |
1257 | if (packet->ipx_pktsize & htons(1)) | |
1258 | sum += ntohs(0xff00) & *p; | |
1259 | ||
1260 | /* Do final fixup */ | |
1261 | sum = (sum & 0xffff) + (sum >> 16); | |
1262 | ||
1263 | /* It's a pity there's no concept of carry in C */ | |
1264 | if (sum >= 0x10000) | |
1265 | sum++; | |
1266 | ||
1267 | return ~sum; | |
1268 | } | |
1269 | ||
1270 | const char *ipx_frame_name(unsigned short frame) | |
1271 | { | |
1272 | char* rc = "None"; | |
1273 | ||
1274 | switch (ntohs(frame)) { | |
1275 | case ETH_P_IPX: rc = "EtherII"; break; | |
1276 | case ETH_P_802_2: rc = "802.2"; break; | |
1277 | case ETH_P_SNAP: rc = "SNAP"; break; | |
1278 | case ETH_P_802_3: rc = "802.3"; break; | |
1279 | case ETH_P_TR_802_2: rc = "802.2TR"; break; | |
1280 | } | |
1281 | ||
1282 | return rc; | |
1283 | } | |
1284 | ||
1285 | const char *ipx_device_name(struct ipx_interface *intrfc) | |
1286 | { | |
1287 | return intrfc->if_internal ? "Internal" : | |
1288 | intrfc->if_dev ? intrfc->if_dev->name : "Unknown"; | |
1289 | } | |
1290 | ||
1291 | /* Handling for system calls applied via the various interfaces to an IPX | |
1292 | * socket object. */ | |
1293 | ||
1294 | static int ipx_setsockopt(struct socket *sock, int level, int optname, | |
1295 | char __user *optval, int optlen) | |
1296 | { | |
1297 | struct sock *sk = sock->sk; | |
1298 | int opt; | |
1299 | int rc = -EINVAL; | |
1300 | ||
1301 | if (optlen != sizeof(int)) | |
1302 | goto out; | |
1303 | ||
1304 | rc = -EFAULT; | |
1305 | if (get_user(opt, (unsigned int __user *)optval)) | |
1306 | goto out; | |
1307 | ||
1308 | rc = -ENOPROTOOPT; | |
1309 | if (!(level == SOL_IPX && optname == IPX_TYPE)) | |
1310 | goto out; | |
1311 | ||
1312 | ipx_sk(sk)->type = opt; | |
1313 | rc = 0; | |
1314 | out: | |
1315 | return rc; | |
1316 | } | |
1317 | ||
1318 | static int ipx_getsockopt(struct socket *sock, int level, int optname, | |
1319 | char __user *optval, int __user *optlen) | |
1320 | { | |
1321 | struct sock *sk = sock->sk; | |
1322 | int val = 0; | |
1323 | int len; | |
1324 | int rc = -ENOPROTOOPT; | |
1325 | ||
1326 | if (!(level == SOL_IPX && optname == IPX_TYPE)) | |
1327 | goto out; | |
1328 | ||
1329 | val = ipx_sk(sk)->type; | |
1330 | ||
1331 | rc = -EFAULT; | |
1332 | if (get_user(len, optlen)) | |
1333 | goto out; | |
1334 | ||
1335 | len = min_t(unsigned int, len, sizeof(int)); | |
1336 | rc = -EINVAL; | |
1337 | if(len < 0) | |
1338 | goto out; | |
1339 | ||
1340 | rc = -EFAULT; | |
1341 | if (put_user(len, optlen) || copy_to_user(optval, &val, len)) | |
1342 | goto out; | |
1343 | ||
1344 | rc = 0; | |
1345 | out: | |
1346 | return rc; | |
1347 | } | |
1348 | ||
1349 | static struct proto ipx_proto = { | |
1350 | .name = "IPX", | |
1351 | .owner = THIS_MODULE, | |
1352 | .obj_size = sizeof(struct ipx_sock), | |
1353 | }; | |
1354 | ||
1355 | static int ipx_create(struct socket *sock, int protocol) | |
1356 | { | |
1357 | int rc = -ESOCKTNOSUPPORT; | |
1358 | struct sock *sk; | |
1359 | ||
1360 | /* | |
1361 | * SPX support is not anymore in the kernel sources. If you want to | |
1362 | * ressurrect it, completing it and making it understand shared skbs, | |
1363 | * be fully multithreaded, etc, grab the sources in an early 2.5 kernel | |
1364 | * tree. | |
1365 | */ | |
1366 | if (sock->type != SOCK_DGRAM) | |
1367 | goto out; | |
1368 | ||
1369 | rc = -ENOMEM; | |
1370 | sk = sk_alloc(PF_IPX, GFP_KERNEL, &ipx_proto, 1); | |
1371 | if (!sk) | |
1372 | goto out; | |
1373 | #ifdef IPX_REFCNT_DEBUG | |
1374 | atomic_inc(&ipx_sock_nr); | |
1375 | printk(KERN_DEBUG "IPX socket %p created, now we have %d alive\n", sk, | |
1376 | atomic_read(&ipx_sock_nr)); | |
1377 | #endif | |
1378 | sock_init_data(sock, sk); | |
1379 | sk->sk_no_check = 1; /* Checksum off by default */ | |
1380 | sock->ops = &ipx_dgram_ops; | |
1381 | rc = 0; | |
1382 | out: | |
1383 | return rc; | |
1384 | } | |
1385 | ||
1386 | static int ipx_release(struct socket *sock) | |
1387 | { | |
1388 | struct sock *sk = sock->sk; | |
1389 | ||
1390 | if (!sk) | |
1391 | goto out; | |
1392 | ||
1393 | if (!sock_flag(sk, SOCK_DEAD)) | |
1394 | sk->sk_state_change(sk); | |
1395 | ||
1396 | sock_set_flag(sk, SOCK_DEAD); | |
1397 | sock->sk = NULL; | |
1398 | ipx_destroy_socket(sk); | |
1399 | out: | |
1400 | return 0; | |
1401 | } | |
1402 | ||
1403 | /* caller must hold a reference to intrfc */ | |
1404 | ||
1405 | static unsigned short ipx_first_free_socketnum(struct ipx_interface *intrfc) | |
1406 | { | |
1407 | unsigned short socketNum = intrfc->if_sknum; | |
1408 | ||
1409 | spin_lock_bh(&intrfc->if_sklist_lock); | |
1410 | ||
1411 | if (socketNum < IPX_MIN_EPHEMERAL_SOCKET) | |
1412 | socketNum = IPX_MIN_EPHEMERAL_SOCKET; | |
1413 | ||
1414 | while (__ipxitf_find_socket(intrfc, ntohs(socketNum))) | |
1415 | if (socketNum > IPX_MAX_EPHEMERAL_SOCKET) | |
1416 | socketNum = IPX_MIN_EPHEMERAL_SOCKET; | |
1417 | else | |
1418 | socketNum++; | |
1419 | ||
1420 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
1421 | intrfc->if_sknum = socketNum; | |
1422 | ||
1423 | return ntohs(socketNum); | |
1424 | } | |
1425 | ||
1426 | static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
1427 | { | |
1428 | struct sock *sk = sock->sk; | |
1429 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1430 | struct ipx_interface *intrfc; | |
1431 | struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr; | |
1432 | int rc = -EINVAL; | |
1433 | ||
1434 | if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx)) | |
1435 | goto out; | |
1436 | ||
1437 | intrfc = ipxitf_find_using_net(addr->sipx_network); | |
1438 | rc = -EADDRNOTAVAIL; | |
1439 | if (!intrfc) | |
1440 | goto out; | |
1441 | ||
1442 | if (!addr->sipx_port) { | |
1443 | addr->sipx_port = ipx_first_free_socketnum(intrfc); | |
1444 | rc = -EINVAL; | |
1445 | if (!addr->sipx_port) | |
1446 | goto out_put; | |
1447 | } | |
1448 | ||
1449 | /* protect IPX system stuff like routing/sap */ | |
1450 | rc = -EACCES; | |
1451 | if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET && | |
1452 | !capable(CAP_NET_ADMIN)) | |
1453 | goto out_put; | |
1454 | ||
1455 | ipxs->port = addr->sipx_port; | |
1456 | ||
1457 | #ifdef CONFIG_IPX_INTERN | |
1458 | if (intrfc == ipx_internal_net) { | |
1459 | /* The source address is to be set explicitly if the | |
1460 | * socket is to be bound on the internal network. If a | |
1461 | * node number 0 was specified, the default is used. | |
1462 | */ | |
1463 | ||
1464 | rc = -EINVAL; | |
1465 | if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN)) | |
1466 | goto out_put; | |
1467 | if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN)) | |
1468 | memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN); | |
1469 | else | |
1470 | memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN); | |
1471 | ||
1472 | rc = -EADDRINUSE; | |
1473 | if (ipxitf_find_internal_socket(intrfc, ipxs->node, | |
1474 | ipxs->port)) { | |
1475 | SOCK_DEBUG(sk, | |
1476 | "IPX: bind failed because port %X in use.\n", | |
1477 | ntohs((int)addr->sipx_port)); | |
1478 | goto out_put; | |
1479 | } | |
1480 | } else { | |
1481 | /* Source addresses are easy. It must be our | |
1482 | * network:node pair for an interface routed to IPX | |
1483 | * with the ipx routing ioctl() | |
1484 | */ | |
1485 | ||
1486 | memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN); | |
1487 | ||
1488 | rc = -EADDRINUSE; | |
1489 | if (ipxitf_find_socket(intrfc, addr->sipx_port)) { | |
1490 | SOCK_DEBUG(sk, | |
1491 | "IPX: bind failed because port %X in use.\n", | |
1492 | ntohs((int)addr->sipx_port)); | |
1493 | goto out_put; | |
1494 | } | |
1495 | } | |
1496 | ||
1497 | #else /* !def CONFIG_IPX_INTERN */ | |
1498 | ||
1499 | /* Source addresses are easy. It must be our network:node pair for | |
1500 | an interface routed to IPX with the ipx routing ioctl() */ | |
1501 | ||
1502 | rc = -EADDRINUSE; | |
1503 | if (ipxitf_find_socket(intrfc, addr->sipx_port)) { | |
1504 | SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n", | |
1505 | ntohs((int)addr->sipx_port)); | |
1506 | goto out_put; | |
1507 | } | |
1508 | ||
1509 | #endif /* CONFIG_IPX_INTERN */ | |
1510 | ||
1511 | ipxitf_insert_socket(intrfc, sk); | |
1512 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1513 | ||
1514 | rc = 0; | |
1515 | out_put: | |
1516 | ipxitf_put(intrfc); | |
1517 | out: | |
1518 | return rc; | |
1519 | } | |
1520 | ||
1521 | static int ipx_connect(struct socket *sock, struct sockaddr *uaddr, | |
1522 | int addr_len, int flags) | |
1523 | { | |
1524 | struct sock *sk = sock->sk; | |
1525 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1526 | struct sockaddr_ipx *addr; | |
1527 | int rc = -EINVAL; | |
1528 | struct ipx_route *rt; | |
1529 | ||
1530 | sk->sk_state = TCP_CLOSE; | |
1531 | sock->state = SS_UNCONNECTED; | |
1532 | ||
1533 | if (addr_len != sizeof(*addr)) | |
1534 | goto out; | |
1535 | addr = (struct sockaddr_ipx *)uaddr; | |
1536 | ||
1537 | /* put the autobinding in */ | |
1538 | if (!ipxs->port) { | |
1539 | struct sockaddr_ipx uaddr; | |
1540 | ||
1541 | uaddr.sipx_port = 0; | |
1542 | uaddr.sipx_network = 0; | |
1543 | ||
1544 | #ifdef CONFIG_IPX_INTERN | |
1545 | rc = -ENETDOWN; | |
1546 | if (!ipxs->intrfc) | |
1547 | goto out; /* Someone zonked the iface */ | |
1548 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, | |
1549 | IPX_NODE_LEN); | |
1550 | #endif /* CONFIG_IPX_INTERN */ | |
1551 | ||
1552 | rc = ipx_bind(sock, (struct sockaddr *)&uaddr, | |
1553 | sizeof(struct sockaddr_ipx)); | |
1554 | if (rc) | |
1555 | goto out; | |
1556 | } | |
1557 | ||
1558 | /* We can either connect to primary network or somewhere | |
1559 | * we can route to */ | |
1560 | rt = ipxrtr_lookup(addr->sipx_network); | |
1561 | rc = -ENETUNREACH; | |
1562 | if (!rt && !(!addr->sipx_network && ipx_primary_net)) | |
1563 | goto out; | |
1564 | ||
1565 | ipxs->dest_addr.net = addr->sipx_network; | |
1566 | ipxs->dest_addr.sock = addr->sipx_port; | |
1567 | memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN); | |
1568 | ipxs->type = addr->sipx_type; | |
1569 | ||
1570 | if (sock->type == SOCK_DGRAM) { | |
1571 | sock->state = SS_CONNECTED; | |
1572 | sk->sk_state = TCP_ESTABLISHED; | |
1573 | } | |
1574 | ||
1575 | if (rt) | |
1576 | ipxrtr_put(rt); | |
1577 | rc = 0; | |
1578 | out: | |
1579 | return rc; | |
1580 | } | |
1581 | ||
1582 | ||
1583 | static int ipx_getname(struct socket *sock, struct sockaddr *uaddr, | |
1584 | int *uaddr_len, int peer) | |
1585 | { | |
1586 | struct ipx_address *addr; | |
1587 | struct sockaddr_ipx sipx; | |
1588 | struct sock *sk = sock->sk; | |
1589 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1590 | int rc; | |
1591 | ||
1592 | *uaddr_len = sizeof(struct sockaddr_ipx); | |
1593 | ||
1594 | if (peer) { | |
1595 | rc = -ENOTCONN; | |
1596 | if (sk->sk_state != TCP_ESTABLISHED) | |
1597 | goto out; | |
1598 | ||
1599 | addr = &ipxs->dest_addr; | |
1600 | sipx.sipx_network = addr->net; | |
1601 | sipx.sipx_port = addr->sock; | |
1602 | memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN); | |
1603 | } else { | |
1604 | if (ipxs->intrfc) { | |
1605 | sipx.sipx_network = ipxs->intrfc->if_netnum; | |
1606 | #ifdef CONFIG_IPX_INTERN | |
1607 | memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN); | |
1608 | #else | |
1609 | memcpy(sipx.sipx_node, ipxs->intrfc->if_node, | |
1610 | IPX_NODE_LEN); | |
1611 | #endif /* CONFIG_IPX_INTERN */ | |
1612 | ||
1613 | } else { | |
1614 | sipx.sipx_network = 0; | |
1615 | memset(sipx.sipx_node, '\0', IPX_NODE_LEN); | |
1616 | } | |
1617 | ||
1618 | sipx.sipx_port = ipxs->port; | |
1619 | } | |
1620 | ||
1621 | sipx.sipx_family = AF_IPX; | |
1622 | sipx.sipx_type = ipxs->type; | |
1623 | sipx.sipx_zero = 0; | |
1624 | memcpy(uaddr, &sipx, sizeof(sipx)); | |
1625 | ||
1626 | rc = 0; | |
1627 | out: | |
1628 | return rc; | |
1629 | } | |
1630 | ||
f2ccd8fa | 1631 | static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4 LT |
1632 | { |
1633 | /* NULL here for pt means the packet was looped back */ | |
1634 | struct ipx_interface *intrfc; | |
1635 | struct ipxhdr *ipx; | |
1636 | u16 ipx_pktsize; | |
1637 | int rc = 0; | |
1638 | ||
1639 | /* Not ours */ | |
1640 | if (skb->pkt_type == PACKET_OTHERHOST) | |
1641 | goto drop; | |
1642 | ||
1643 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) | |
1644 | goto out; | |
1645 | ||
1646 | ipx = ipx_hdr(skb); | |
1647 | ipx_pktsize = ntohs(ipx->ipx_pktsize); | |
1648 | ||
1649 | /* Too small or invalid header? */ | |
1650 | if (ipx_pktsize < sizeof(struct ipxhdr) || ipx_pktsize > skb->len) | |
1651 | goto drop; | |
1652 | ||
1653 | if (ipx->ipx_checksum != IPX_NO_CHECKSUM && | |
1654 | ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize)) | |
1655 | goto drop; | |
1656 | ||
1657 | IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl; | |
1658 | IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net; | |
1659 | IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net; | |
1660 | ||
1661 | /* Determine what local ipx endpoint this is */ | |
1662 | intrfc = ipxitf_find_using_phys(dev, pt->type); | |
1663 | if (!intrfc) { | |
1664 | if (ipxcfg_auto_create_interfaces && | |
1665 | ntohl(IPX_SKB_CB(skb)->ipx_dest_net)) { | |
1666 | intrfc = ipxitf_auto_create(dev, pt->type); | |
1667 | if (intrfc) | |
1668 | ipxitf_hold(intrfc); | |
1669 | } | |
1670 | ||
1671 | if (!intrfc) /* Not one of ours */ | |
1672 | /* or invalid packet for auto creation */ | |
1673 | goto drop; | |
1674 | } | |
1675 | ||
1676 | rc = ipxitf_rcv(intrfc, skb); | |
1677 | ipxitf_put(intrfc); | |
1678 | goto out; | |
1679 | drop: | |
1680 | kfree_skb(skb); | |
1681 | out: | |
1682 | return rc; | |
1683 | } | |
1684 | ||
1685 | static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1686 | struct msghdr *msg, size_t len) | |
1687 | { | |
1688 | struct sock *sk = sock->sk; | |
1689 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1690 | struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name; | |
1691 | struct sockaddr_ipx local_sipx; | |
1692 | int rc = -EINVAL; | |
1693 | int flags = msg->msg_flags; | |
1694 | ||
1695 | /* Socket gets bound below anyway */ | |
1696 | /* if (sk->sk_zapped) | |
1697 | return -EIO; */ /* Socket not bound */ | |
1698 | if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) | |
1699 | goto out; | |
1700 | ||
1701 | /* Max possible packet size limited by 16 bit pktsize in header */ | |
1702 | if (len >= 65535 - sizeof(struct ipxhdr)) | |
1703 | goto out; | |
1704 | ||
1705 | if (usipx) { | |
1706 | if (!ipxs->port) { | |
1707 | struct sockaddr_ipx uaddr; | |
1708 | ||
1709 | uaddr.sipx_port = 0; | |
1710 | uaddr.sipx_network = 0; | |
1711 | #ifdef CONFIG_IPX_INTERN | |
1712 | rc = -ENETDOWN; | |
1713 | if (!ipxs->intrfc) | |
1714 | goto out; /* Someone zonked the iface */ | |
1715 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, | |
1716 | IPX_NODE_LEN); | |
1717 | #endif | |
1718 | rc = ipx_bind(sock, (struct sockaddr *)&uaddr, | |
1719 | sizeof(struct sockaddr_ipx)); | |
1720 | if (rc) | |
1721 | goto out; | |
1722 | } | |
1723 | ||
1724 | rc = -EINVAL; | |
1725 | if (msg->msg_namelen < sizeof(*usipx) || | |
1726 | usipx->sipx_family != AF_IPX) | |
1727 | goto out; | |
1728 | } else { | |
1729 | rc = -ENOTCONN; | |
1730 | if (sk->sk_state != TCP_ESTABLISHED) | |
1731 | goto out; | |
1732 | ||
1733 | usipx = &local_sipx; | |
1734 | usipx->sipx_family = AF_IPX; | |
1735 | usipx->sipx_type = ipxs->type; | |
1736 | usipx->sipx_port = ipxs->dest_addr.sock; | |
1737 | usipx->sipx_network = ipxs->dest_addr.net; | |
1738 | memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN); | |
1739 | } | |
1740 | ||
1741 | rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len, | |
1742 | flags & MSG_DONTWAIT); | |
1743 | if (rc >= 0) | |
1744 | rc = len; | |
1745 | out: | |
1746 | return rc; | |
1747 | } | |
1748 | ||
1749 | ||
1750 | static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1751 | struct msghdr *msg, size_t size, int flags) | |
1752 | { | |
1753 | struct sock *sk = sock->sk; | |
1754 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1755 | struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name; | |
1756 | struct ipxhdr *ipx = NULL; | |
1757 | struct sk_buff *skb; | |
1758 | int copied, rc; | |
1759 | ||
1760 | /* put the autobinding in */ | |
1761 | if (!ipxs->port) { | |
1762 | struct sockaddr_ipx uaddr; | |
1763 | ||
1764 | uaddr.sipx_port = 0; | |
1765 | uaddr.sipx_network = 0; | |
1766 | ||
1767 | #ifdef CONFIG_IPX_INTERN | |
1768 | rc = -ENETDOWN; | |
1769 | if (!ipxs->intrfc) | |
1770 | goto out; /* Someone zonked the iface */ | |
1771 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN); | |
1772 | #endif /* CONFIG_IPX_INTERN */ | |
1773 | ||
1774 | rc = ipx_bind(sock, (struct sockaddr *)&uaddr, | |
1775 | sizeof(struct sockaddr_ipx)); | |
1776 | if (rc) | |
1777 | goto out; | |
1778 | } | |
1779 | ||
1780 | rc = -ENOTCONN; | |
1781 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1782 | goto out; | |
1783 | ||
1784 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
1785 | flags & MSG_DONTWAIT, &rc); | |
1786 | if (!skb) | |
1787 | goto out; | |
1788 | ||
1789 | ipx = ipx_hdr(skb); | |
1790 | copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr); | |
1791 | if (copied > size) { | |
1792 | copied = size; | |
1793 | msg->msg_flags |= MSG_TRUNC; | |
1794 | } | |
1795 | ||
1796 | rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov, | |
1797 | copied); | |
1798 | if (rc) | |
1799 | goto out_free; | |
a61bbcf2 | 1800 | if (skb->tstamp.off_sec) |
7de76272 | 1801 | skb_get_timestamp(skb, &sk->sk_stamp); |
1da177e4 LT |
1802 | |
1803 | msg->msg_namelen = sizeof(*sipx); | |
1804 | ||
1805 | if (sipx) { | |
1806 | sipx->sipx_family = AF_IPX; | |
1807 | sipx->sipx_port = ipx->ipx_source.sock; | |
1808 | memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN); | |
1809 | sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net; | |
1810 | sipx->sipx_type = ipx->ipx_type; | |
1811 | sipx->sipx_zero = 0; | |
1812 | } | |
1813 | rc = copied; | |
1814 | ||
1815 | out_free: | |
1816 | skb_free_datagram(sk, skb); | |
1817 | out: | |
1818 | return rc; | |
1819 | } | |
1820 | ||
1821 | ||
1822 | static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1823 | { | |
1824 | int rc = 0; | |
1825 | long amount = 0; | |
1826 | struct sock *sk = sock->sk; | |
1827 | void __user *argp = (void __user *)arg; | |
1828 | ||
1829 | switch (cmd) { | |
1830 | case TIOCOUTQ: | |
1831 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
1832 | if (amount < 0) | |
1833 | amount = 0; | |
1834 | rc = put_user(amount, (int __user *)argp); | |
1835 | break; | |
1836 | case TIOCINQ: { | |
1837 | struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); | |
1838 | /* These two are safe on a single CPU system as only | |
1839 | * user tasks fiddle here */ | |
1840 | if (skb) | |
1841 | amount = skb->len - sizeof(struct ipxhdr); | |
1842 | rc = put_user(amount, (int __user *)argp); | |
1843 | break; | |
1844 | } | |
1845 | case SIOCADDRT: | |
1846 | case SIOCDELRT: | |
1847 | rc = -EPERM; | |
1848 | if (capable(CAP_NET_ADMIN)) | |
1849 | rc = ipxrtr_ioctl(cmd, argp); | |
1850 | break; | |
1851 | case SIOCSIFADDR: | |
1852 | case SIOCAIPXITFCRT: | |
1853 | case SIOCAIPXPRISLT: | |
1854 | rc = -EPERM; | |
1855 | if (!capable(CAP_NET_ADMIN)) | |
1856 | break; | |
1857 | case SIOCGIFADDR: | |
1858 | rc = ipxitf_ioctl(cmd, argp); | |
1859 | break; | |
1860 | case SIOCIPXCFGDATA: | |
1861 | rc = ipxcfg_get_config_data(argp); | |
1862 | break; | |
1863 | case SIOCIPXNCPCONN: | |
1864 | /* | |
1865 | * This socket wants to take care of the NCP connection | |
1866 | * handed to us in arg. | |
1867 | */ | |
1868 | rc = -EPERM; | |
1869 | if (!capable(CAP_NET_ADMIN)) | |
1870 | break; | |
1871 | rc = get_user(ipx_sk(sk)->ipx_ncp_conn, | |
1872 | (const unsigned short __user *)argp); | |
1873 | break; | |
1874 | case SIOCGSTAMP: | |
1875 | rc = -EINVAL; | |
1876 | if (sk) | |
1877 | rc = sock_get_timestamp(sk, argp); | |
1878 | break; | |
1879 | case SIOCGIFDSTADDR: | |
1880 | case SIOCSIFDSTADDR: | |
1881 | case SIOCGIFBRDADDR: | |
1882 | case SIOCSIFBRDADDR: | |
1883 | case SIOCGIFNETMASK: | |
1884 | case SIOCSIFNETMASK: | |
1885 | rc = -EINVAL; | |
1886 | break; | |
1887 | default: | |
b5e5fa5e | 1888 | rc = -ENOIOCTLCMD; |
1da177e4 LT |
1889 | break; |
1890 | } | |
1891 | ||
1892 | return rc; | |
1893 | } | |
1894 | ||
1895 | /* | |
1896 | * Socket family declarations | |
1897 | */ | |
1898 | ||
1899 | static struct net_proto_family ipx_family_ops = { | |
1900 | .family = PF_IPX, | |
1901 | .create = ipx_create, | |
1902 | .owner = THIS_MODULE, | |
1903 | }; | |
1904 | ||
90ddc4f0 | 1905 | static const struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = { |
1da177e4 LT |
1906 | .family = PF_IPX, |
1907 | .owner = THIS_MODULE, | |
1908 | .release = ipx_release, | |
1909 | .bind = ipx_bind, | |
1910 | .connect = ipx_connect, | |
1911 | .socketpair = sock_no_socketpair, | |
1912 | .accept = sock_no_accept, | |
1913 | .getname = ipx_getname, | |
1914 | .poll = datagram_poll, | |
1915 | .ioctl = ipx_ioctl, | |
1916 | .listen = sock_no_listen, | |
1917 | .shutdown = sock_no_shutdown, /* FIXME: support shutdown */ | |
1918 | .setsockopt = ipx_setsockopt, | |
1919 | .getsockopt = ipx_getsockopt, | |
1920 | .sendmsg = ipx_sendmsg, | |
1921 | .recvmsg = ipx_recvmsg, | |
1922 | .mmap = sock_no_mmap, | |
1923 | .sendpage = sock_no_sendpage, | |
1924 | }; | |
1925 | ||
1926 | #include <linux/smp_lock.h> | |
1927 | SOCKOPS_WRAP(ipx_dgram, PF_IPX); | |
1928 | ||
1929 | static struct packet_type ipx_8023_packet_type = { | |
1930 | .type = __constant_htons(ETH_P_802_3), | |
1931 | .func = ipx_rcv, | |
1932 | }; | |
1933 | ||
1934 | static struct packet_type ipx_dix_packet_type = { | |
1935 | .type = __constant_htons(ETH_P_IPX), | |
1936 | .func = ipx_rcv, | |
1937 | }; | |
1938 | ||
1939 | static struct notifier_block ipx_dev_notifier = { | |
1940 | .notifier_call = ipxitf_device_event, | |
1941 | }; | |
1942 | ||
1943 | extern struct datalink_proto *make_EII_client(void); | |
1da177e4 | 1944 | extern void destroy_EII_client(struct datalink_proto *); |
1da177e4 LT |
1945 | |
1946 | static unsigned char ipx_8022_type = 0xE0; | |
1947 | static unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 }; | |
1948 | static char ipx_EII_err_msg[] __initdata = | |
1949 | KERN_CRIT "IPX: Unable to register with Ethernet II\n"; | |
1950 | static char ipx_8023_err_msg[] __initdata = | |
1951 | KERN_CRIT "IPX: Unable to register with 802.3\n"; | |
1952 | static char ipx_llc_err_msg[] __initdata = | |
1953 | KERN_CRIT "IPX: Unable to register with 802.2\n"; | |
1954 | static char ipx_snap_err_msg[] __initdata = | |
1955 | KERN_CRIT "IPX: Unable to register with SNAP\n"; | |
1956 | ||
1957 | static int __init ipx_init(void) | |
1958 | { | |
1959 | int rc = proto_register(&ipx_proto, 1); | |
1960 | ||
1961 | if (rc != 0) | |
1962 | goto out; | |
1963 | ||
1964 | sock_register(&ipx_family_ops); | |
1965 | ||
1966 | pEII_datalink = make_EII_client(); | |
1967 | if (pEII_datalink) | |
1968 | dev_add_pack(&ipx_dix_packet_type); | |
1969 | else | |
1970 | printk(ipx_EII_err_msg); | |
1971 | ||
1972 | p8023_datalink = make_8023_client(); | |
1973 | if (p8023_datalink) | |
1974 | dev_add_pack(&ipx_8023_packet_type); | |
1975 | else | |
1976 | printk(ipx_8023_err_msg); | |
1977 | ||
1978 | p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv); | |
1979 | if (!p8022_datalink) | |
1980 | printk(ipx_llc_err_msg); | |
1981 | ||
1982 | pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv); | |
1983 | if (!pSNAP_datalink) | |
1984 | printk(ipx_snap_err_msg); | |
1985 | ||
1986 | register_netdevice_notifier(&ipx_dev_notifier); | |
1987 | ipx_register_sysctl(); | |
1988 | ipx_proc_init(); | |
1989 | out: | |
1990 | return rc; | |
1991 | } | |
1992 | ||
1993 | static void __exit ipx_proto_finito(void) | |
1994 | { | |
1995 | ipx_proc_exit(); | |
1996 | ipx_unregister_sysctl(); | |
1997 | ||
1998 | unregister_netdevice_notifier(&ipx_dev_notifier); | |
1999 | ||
2000 | ipxitf_cleanup(); | |
2001 | ||
2002 | unregister_snap_client(pSNAP_datalink); | |
2003 | pSNAP_datalink = NULL; | |
2004 | ||
2005 | unregister_8022_client(p8022_datalink); | |
2006 | p8022_datalink = NULL; | |
2007 | ||
2008 | dev_remove_pack(&ipx_8023_packet_type); | |
2009 | destroy_8023_client(p8023_datalink); | |
2010 | p8023_datalink = NULL; | |
2011 | ||
2012 | dev_remove_pack(&ipx_dix_packet_type); | |
2013 | destroy_EII_client(pEII_datalink); | |
2014 | pEII_datalink = NULL; | |
2015 | ||
2016 | proto_unregister(&ipx_proto); | |
2017 | sock_unregister(ipx_family_ops.family); | |
2018 | } | |
2019 | ||
2020 | module_init(ipx_init); | |
2021 | module_exit(ipx_proto_finito); | |
2022 | MODULE_LICENSE("GPL"); | |
2023 | MODULE_ALIAS_NETPROTO(PF_IPX); |